全地形履带式卫生急救车水上行驶特性数值模拟研究

Numerical Simulation for Sailing Characteristic of All-terrain Tracked Emergency Ambulance

运用计算流体动力学(CFD)方法对全地形履带式卫生急救车的水上行驶稳定性进行了数值模拟,对车辆在水上的行驶性能进行了试验,将试验结果与数值仿真结果进行了对比。研究结果表明:前车和后车的前后部流体流动发生分离现象,在前车和后车之间区域以及后车后部形成涡旋运动,涡旋运动会形成低压区;前车和后车周围存在不同的压力分布,形成压差阻力;在前车和后车的前部均产生兴波现象。

The CFD（Computational Fluid Dynamic） technology was used to investigate the sailing characteristic of all-terrain tracked emergency ambulance. The experiment for sailing all-terrain tracked emergency ambulance was carried out. The simulation results were validated by the experimental results based on the sailing experiment. The results show that fluid is separated at bow and stem of front vehicle and back vehicle. Swirls come into being between front vehicle and back vehicle and at stern of back vehicle, finally leading to low pressure zone. Pressure difference exists around all-terrain tracked emergency ambulance. Waves were created at bow of front vehicle and back vehicle.